Energetics of growth of Microbacterium thermosphactum at low temperatures.
Microbacterium thermosphactum was grown at 5 degrees C in glucose-limited continuous cultures. The end products of glucose metabolism were L-lactate and ethanol, and these compounds accounted for 86--92% of the glucose utilized. With input glucose concentrations less than 3 mV, YgluMax was found to be 40--43, YATPMax 20--21 and ms 0.1--0.2. These values are almost identical to those found previously for cultures at 25 degrees C and show that this psychrotroph grows with a very high energetic efficiency over a wide range of temperatures. With a higher (but still limiting) input glucose concentration of 5.6 mM at 9 degrees C, cellular efficiency declined as there was a marked reduction in Yglu. This decrease was accounted for in mathematical terms by an increase in ms to 0.7, whilst YgluMax and gh energetic efficiency over a wide range of temperatures. With a higher (but still limiting) input glucose concentration of 5.6 mM at 9 degrees C, cellular efficiency declined as there was a marked reduction in Yglu. This decrease was accounted for in mathematical terms by an increase in ms to 0.7, whilst YgluMax and gh energetic efficiency over a wide range of temperatures. With a higher (but still limiting) input glucose concentration of 5.6 mM at 9 degrees C, cellular efficiency declined as there was a marked reduction in Yglu. This decrease was accounted for in mathematical terms by an increase in ms to 0.7, whilst YgluMax and YATPMax remained high at 38 and 19 respectively.
D000192:Actinomycetales / Q000254:growth & development*; D000255:Adenosine Triphosphate / Q000096:biosynthesis / Q000378:metabolism; D000693:Anaerobiosis; D004734:Energy Metabolism; D005947:Glucose / Q000378:metabolism; D013696:Temperature
D000255:Adenosine Triphosphate; D005947:Glucose